Threshold Motor Temperature; Motor Temperature Reaction - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
Insulation class
Y
A
E
B
F
H
The motor overheating disturbance threshold is automatically set by the inverter at 10% higher than the
temperature declared in parameter P0604.
If the sensor KTY84 is activated, the motor temperature is then additionally calculated via the thermal motor
model. Should the sensor KTY84 recognise a wire breakage, an alarm F0015 (loss of the motor
temperature signal) is then generated and the thermal motor model is automatically switched to.
Connection failure:
If the connection to the PTC or KTY84 sensor becomes open circuit or short circuit, a fault will be indicated,
and by default the drive will trip.
P0604[3]

Threshold motor temperature

CStat: CUT
P-Group: MOTOR
Enters warning threshold for motor temperature protection.
The trip temperature defined always 10 % higher than the warning level P0604. When act. motor
temperature exeeds trip temperature than inverter trip as defined in P0610.
ϑ = ⋅ ϑ
1.1
trip warn
Index:
P0604[0] : 1st. Drive data set (DDS)
P0604[1] : 2nd. Drive data set (DDS)
P0604[2] : 3rd. Drive data set (DDS)
Dependency:
This value should be at least 40°C greater than the motor ambient temperature P0625.
P0604 ≥ P0625 + 40 °C
Note:
Default value depends on P0300 (select motor type).
P0610[3]

Motor temperature reaction

CStat: CT
P-Group: MOTOR
Defines reaction when motor temperature reaches warning threshold.
Possible Settings:
0 Warning, no reaction, no trip
1 Warning, Imax reduction, trip F0011
2 Warning, no reaction, trip F0011
Index:
P0610[0] : 1st. Drive data set (DDS)
P0610[1] : 2nd. Drive data set (DDS)
P0610[2] : 3rd. Drive data set (DDS)
Dependency:
ϑ = ⋅ ϑ
1.1
trip warn
Note:
P0610 = 1:
If the max. permissible current Imax is reduced, this results in a lower output frequency.
The motor temperature depends on many factors. These factors include the size of the motor, the ambient
temperature, the previous motor load and naturally the load current.
Because most motors are cooled by fans integrated in the motor and running at the motor speed, the speed
of the motor is also important. Clearly a motor running with a high current (maybe due to boost) and a low
speed, will overheat more quickly than one running at 50 or 60 Hz, full load. The MM4 take account of these
factors.
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Extract of IEC 85
End temperature
90 °C
105 °C
120 °C
130 °C
155 °C
180 °C
Datatype: Float
Active: Immediately
ϑ
:
= ⋅ Warning threshold (P0604)
1.1 P0604
warn
ϑ
: Trip threshold (max. permissible temperature)
trip
Datatype: U16
Active: first confirm
ϑ
:
= ⋅ Warning threshold (P0604)
1.1 P0604
warn
ϑ
: Trip threshold (max. permissible temperature)
trip
Parameter Description
Min: 0.0
Unit: °C Def: 130.0
QuickComm.: No Max: 200.0
Min: 0
Unit: - Def: 2
QuickComm.: No Max: 2
Level
2
Level
3
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